A man on trial for murdering 19 residents and injuring 26 other people in 2016, at a knife rampage at a care home for the mentally disabled, said Wednesday he would not launch an appeal regardless of the ruling.

During the trial at the Yokohama District Court in Kanagawa Prefecture, the defense team for Satoshi Uematsu, a 30-year-old former employee of the facility, argued in a closing statement that he should not be held responsible for his actions due to mental incompetence.

The defense cast doubt on the results of a psychiatric assessment, pointing out that the doctor who performed it had not taken into account a marijuana-induced psychotic disorder.